Diff: compare.h

Revision:

0:b47c2a7920c2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/compare.h	Fri Mar 16 16:34:18 2018 +0000
@@ -0,0 +1,81 @@
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+https://www.etlcpp.com
+
+Copyright(c) 2017 jwellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef __ETL_COMPARE__
+#define __ETL_COMPARE__
+
+#include <functional>
+
+#include "platform.h"
+#include "parameter_type.h"
+
+//*****************************************************************************
+///\defgroup compare compare
+/// Comparisons only using less than operator
+///\ingroup utilities
+//*****************************************************************************
+
+namespace etl
+{
+  //***************************************************************************
+  /// Defines <=, >, >= interms of <
+  /// Default 
+  //***************************************************************************
+  template <typename T, typename TLess = std::less<T> >
+  struct compare
+  {
+    typedef typename etl::parameter_type<T>::type first_argument_type;
+    typedef typename etl::parameter_type<T>::type second_argument_type;
+    typedef bool result_type;
+
+    static result_type lt(first_argument_type lhs, second_argument_type rhs)
+    {
+      return TLess()(lhs, rhs);
+    }
+
+    static result_type gt(first_argument_type lhs, second_argument_type rhs)
+    {
+      return TLess()(rhs, lhs);
+    }
+
+    static result_type lte(first_argument_type lhs, second_argument_type rhs)
+    {
+      return !gt(lhs, rhs);
+    }
+
+    static result_type gte(first_argument_type lhs, second_argument_type rhs)
+    {
+      return !lt(lhs, rhs);
+    }
+  };
+}
+
+#endif
+